Time was when you had to wait until a mayor’s third term before his administration found itself mired in criminal probes and political disarray.

But Bill de Blasio is already there in the third year of his first — and perhaps only — term as mayor.

De Blasio insists he has “no information” about the federal grand-jury investigation into his fund-raising that everyone in town — except him — seems to know about.

But the recent news suggests that corruption-busting US Attorney Preet Bharara has been probing de Blasio’s money-raising since his earliest months in City Hall.

It also confirms pretty much everything we’ve written about the mayor’s slush fund, the Campaign For One New York, and growing signs that his is a pay-to-play mayoralty.

This despite de Blasio’s attempt over the weekend to suggest he barely knows the two developers reportedly at the center of the investigation — both heavy donors and bundlers to his campaign, one of whom hosted a CONY fund-raiser at his home.

And the fact that, as we’ve long noted, CONY’s contributors consisted largely of people and groups with business before the city or a special interest in getting something done — like the developers behind the drive to kill the horse-carriage industry.

The federal investigation has now led to other scandals: a growing probe into alleged corruption involving top police officials as well as a $12 million Ponzi scheme.

Meanwhile, City Hall remains mired in unanswered questions about the special deal that let another donor sell a nursing home for luxury condos over community objections, netting a $72 million profit.

Time will tell whether any of this involves criminal behavior. But it’s already all too clear that you need to pay admission for a seat at the table in Bill de Blasio’s “one New York.”